Styrene suppressed unsaturated polyester resin compositions

Abstract

An unsaturated polyester resin composition includes small quantities of hydrocarbon wax and small quantities of an unsaturated alkyd resin formed from the reaction of linseed oil fatty acids, alpha, beta-ethylenically unsaturated dicarboxylic acid and glycol. Styrene volatilization from the resulting system is reduced. The secondary bonding properties of the resulting resin composition are not adversely affected.

I claim: 
     
       1. A polymerizable resinous composition comprising 1 part by weight unsaturated polyester resin syrup containing 45 to 80 weight percent unsaturated polyester resin;   20 to 55 weight percent copolymerizable monomers, predominantly monomeric styrene;     0.03 to 0.2 percent by weight hydrocarbon wax;   0.5 to 7.0 percent by weight of an unsaturated alkyd resin product of alpha, beta-ethylenically unsaturated dicarboxylic acid;   glycol; and   linseed oil fatty acids.